/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.dolphinscheduler.server.master.task;

import lombok.NonNull;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.dolphinscheduler.common.lifecycle.ServerLifeCycleManager;
import org.apache.dolphinscheduler.common.model.BaseHeartBeatTask;
import org.apache.dolphinscheduler.common.model.MasterHeartBeat;
import org.apache.dolphinscheduler.common.utils.CollectionUtils;
import org.apache.dolphinscheduler.common.utils.JSONUtils;
import org.apache.dolphinscheduler.common.utils.NetUtils;
import org.apache.dolphinscheduler.common.utils.OSUtils;
import org.apache.dolphinscheduler.registry.api.RegistryClient;
import org.apache.dolphinscheduler.server.master.config.MasterConfig;
import oshi.software.os.OSFileStore;

import java.util.List;
import java.util.stream.Collectors;

@Slf4j
public class MasterHeartBeatTask extends BaseHeartBeatTask<MasterHeartBeat> {

    private final MasterConfig masterConfig;

    private final RegistryClient registryClient;

    private final String heartBeatPath;

    private final int processId;

    public MasterHeartBeatTask(@NonNull MasterConfig masterConfig,
                               @NonNull RegistryClient registryClient) {
        super("MasterHeartBeatTask", masterConfig.getHeartbeatInterval().toMillis());
        this.masterConfig = masterConfig;
        this.registryClient = registryClient;
        this.heartBeatPath = masterConfig.getMasterRegistryPath();
        this.processId = OSUtils.getProcessID();
    }

    @Override
    public MasterHeartBeat getHeartBeat() {
        List<OSFileStore> osFileStores = OSUtils.sysFiles();
        Long dataTotal = 0L;
        Long dataUsed = 0L;
        if (!osFileStores.isEmpty()) {
            osFileStores = osFileStores.stream().filter(it-> StringUtils.isNotBlank(it.getUUID())).filter(CollectionUtils.distinctByKey(OSFileStore::getUUID)).collect(Collectors.toList());
            Long totalSpaceSum = osFileStores.stream().mapToLong(OSFileStore::getTotalSpace).sum();
            Long freeSpaceSum = osFileStores.stream().mapToLong(OSFileStore::getUsableSpace).sum();

            dataTotal = totalSpaceSum;
            dataUsed = totalSpaceSum - freeSpaceSum;
        }
        
        String host = StringUtils.isNotBlank(masterConfig.getMasterAddress()) ? masterConfig.getMasterAddress() : NetUtils.getHost();
        return MasterHeartBeat.builder()
                .startupTime(ServerLifeCycleManager.getServerStartupTime())
                .reportTime(System.currentTimeMillis())
                .cpuUsage(OSUtils.cpuUsagePercentage())
                .availablePhysicalMemorySize(OSUtils.availablePhysicalMemorySize())
                .reservedMemory(masterConfig.getReservedMemory())
                .memoryUsage(OSUtils.memoryUsagePercentage())
                .diskAvailable(OSUtils.diskAvailable())
                .processId(processId)
                .host(host)
                .port(masterConfig.getListenPort())
                .cpuNum(OSUtils.cpuLogicalNum())
                .loadAverage(OSUtils.loadAverage())
                .hostName(OSUtils.hostName())
                .memorySize(OSUtils.memorySize())
                .architecture(OSUtils.architecture())
                .dataUsed(dataUsed)
                .dataTotal(dataTotal)
                .build();
    }

    @Override
    public void writeHeartBeat(MasterHeartBeat masterHeartBeat) {
        String masterHeartBeatJson = JSONUtils.toJsonString(masterHeartBeat);
        registryClient.persistEphemeral(heartBeatPath, masterHeartBeatJson);
        log.debug("Success write master heartBeatInfo into registry, masterRegistryPath: {}, heartBeatInfo: {}",
                heartBeatPath, masterHeartBeatJson);
    }
}
